For now, it’s only a gaping hole in the ground, 100-by-100 feet, surrounded by farm machinery and bales of hemp on a sandy patch of earth in the Lower Sioux Indian Reservation in southwestern Minnesota.
But when construction is complete next April, the Lower Sioux — also known as part of the Mdewakanton Band of Dakota — will have a 20,000-square-foot manufacturing campus that will allow them to pioneer a green experiment, the first of its kind in the United States.
They will have an integrated vertical operation to grow hemp, process it into insulation called hempcrete, and then build healthy homes with it. Right now, no one in the U.S. does all three.
Once the tribe makes this low-carbon material, they can begin to address a severe shortage of housing and jobs. Recapturing a slice of sovereignty would be a win for the Lower Sioux, once a largely woodland people who were subjected to some of the worst brutality against the Indigenous nations in North America.
They lost most of their lands in the 19th century, and the territory finally allotted to them two hours south of Minneapolis consists of just 1,743 acres of poor soil. That stands in contrast to the fertile black earth of the surrounding white-owned farmlands.
read more: https://grist.org/indigenous/hempcrete-lower-sioux-housing/
So mostly concrete
They aren’t using any concrete, it is basically just hemp stalk cores and lime mixed with water. It is just similar in how concrete can be mixed and used along with a marketing term. Seems to be better in function given that it can be used as blocks similar to concrete or bricks, while also being able to use in place of other insulation materials inside walls or in the attic spaces.